Subtract 4/40 from 9/10
9/10 - 4/40 is 4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
9/10 = 9 × 4/10 × 4 = 36/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
4/40 = 4 × 1/40 × 1 = 4/40 - Subtract the two like fractions:
36/40 - 4/40 = 36 - 4/40 = 32/40 - After reducing the fraction, the answer is 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-4/40 9/10-8/40 9/20-4/40 9/10-4/80 27/10-4/40 9/10-12/40 9/30-4/40 45/10-4/40 9/10-20/40 9/50-4/40 63/10-4/40 9/10-28/40 9/70-4/40